The Lighthouse

Avenue Q

If you are interested in going: It's at the Orpheum Theatre in San Francisco. Ticketmaster sells orchestra and loge seats for $90, mezzanine (2nd level) seats for $75, and balcony (3rd level) seats for $45 or $60. There are still quite a few good orchestra seats left for this particular show (8pm on 24th), but it won't be long until they are gone, so grab them fast while they last.